Executive Summary

In the past few years, more storage system applications have employed transaction processing techniques to ensure data integrity and consistency. Logging is one of the key requirements to ensure transaction ACID (Atomicity, Consistency, Isolation, Durability) properties and data recoverability in Transaction Processing Systems (TPS). Recently, emerging complex I/O bound transactions have resulted in substantially more log content and higher log flushing latency. The latency will delay transaction commit and decrease the overall throughput of the TPS. On the other hand, RAID is widely used as the underlying storage system for Databases to guarantee system reliability and availability with high I/O performance.